Helicoidal impeller for use in jet propelled watercraft



FIG. 1 is a front end view of a helicoidal impeller for use in jet propelled watercraft showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a side elevational view thereof, the other sides being substantially identical to that shown; and,

FIG. 4 is a perspective view thereof. 

The ornamental design for a helicoidal impeller for use in jet propelled watercraft, as shown and described. 